Crosley/Mooney
Air-Craft
Engine Specification

This is actually the second specification for the
Crosley engine used in the M-18. The first, dated August 17, 1948
differs only in that there is no reference to the CC46M-2A
engine, and therefore has no Note 5.

DEPARTMENT OF COMMERCECIVIL AERONAUTICS ADMINISTRATIONWASHINGTON

E-255-2MOONEYCC46M-2CC46M-2A

October 7, 1948

AIRCRAFT
ENGINE SPECIFICATION

Engines of models described herein conforming
with this specification and approved data on file with the Civil
Aeronautics Administration are rated as airworthy for use in
certificated aircraft in accordance with pertinent aircraft
specifications.

The manufacturer does not hold
the production certificate for the
production of engines under this type cerificate and, therefore, each
engine so produced is subject to a detailed inspection for workmanship
and conformity with the approved data be a Civil Aeronautics
Administration Inspector. In addition, the engine must have a
satisfactory run-in including 5 hours at rated power and speed. Upon
satisfactory completion of the above, the inspector will tag the engine
with Tag Form 186.

NOTE 1.

Maximum permissible temperatures:

Cylinder head
(at plug)

500°F

Coolant outlet

190°F

Oil inlet

200°F

NOTE 2.

Pressure limits for normal
operation:

Min.

Max.

Oil inlet, psi

40

55

Fuel inlet to carb., psi

2

2.5

Coolant inlet, psi

*

7

* Coolant flow
10 gal./min. minimum at 3900 engine RPM

NOTE 3.

The following accessories are
eligible at the indicated additional weight:

Weight, lbs
AC No. 1538923
fuel
pump
(Mooney part No.
E-272)
2

NOTE 4.

A shield must be provided for
the propeller shaft driving belts to
prevent their contact with water, other liquids and foreign substances
of all kinds.

NOTE
5.

Model
CC46M-2A differs from model -2 in that numerous changes in detail
design have been incorporated in the cylinder block, and other
parts. The external changes include relocation of oil filter,
breather, fuel pump and left spark plug boss.